estrade



(No Model.) Sheets-Sheet 1.

A. ESTRADE.

APPARATUS POR SUPERHEATING STEAM.

Patented Mam. 7,1882.

(No Mpdel.) 2 Sheets-Sheet 2,

A. ESTRADE.

APPARATUS POR SUPERHEATING STEAM.

Patented Mar. 7,1882.

Lam/f 6fm N. Prima Phnlwuxmgmpner. wnsningmm DA CA UNITED STATES PATENTOFFICE.

AUGUSTE ESTRADE, OF PERPIGNAN, FRANCE.

, APPARATUS FOR SUPERHEATING STEAM.

SPECIFICATION forming part of Letters Patent No. 254,628, dated March 7,1882.

Application led November 2l, 1881-. (No model.) Patented in FranceSeptember 10l 1880, and in England September 2S, 1881.

To all whom it may concern:

Be it known that I, AUGUSTE EsTRAnE, a

citizen of France, residing at Perpignan, in the Republic of France,have invented an Improved Apparatus for Superheating Steam, (for which Ihave obtained a patent in France, dated September l0, 1880, and in GreatBritain, dated September 28,1881, No. 4,178,) of which the following isa specification.

Steam is usually superheated by passing it through tubes exposed to thedirect action of tire, which rapidly destroys the material ofthe tubes,rendering them useless.

This invention relates to means whereby the superheating-tubes areprotected against the destructive action of the fire. For this purposethe tube or pipe through which the steam is passed to be superheated isinclosed within an outer pipe in which water ofthe boiler circulates,the two pipes being kept concentric with one another by studs. Thesteam-pipe has placed within it at intervals a number of metal gauze orperforated disks, which, by checking and breaking up such vesicularglobules as may be carried along with the steam, insures the drynessofthe steam. In the boiler of a locomotive or portable enginesuper-heating apparatus of the kind described is conveniently'applied inthe following manner: 'libe-f steam-pipe, having its mouth in the domeor highest part of the boiler, is carried forward along the interior ofthe boiler-crown to the fire-box, in the upper part of which it is bentround and backward and a little upward, the bent part within thefire-box being in closed within the outer protecting-pipe, whichcommunicates at both ends with the waterin the boiler, and which shouldhave connected to it a blowoif pipe to clear out sediment. In boilers of'forms other than that employed for locomotive through the roof at B ofthe {ire-box, within which it is bent horizontal again, extending to thefront, where it is bent back, and thence passes up through the roofagain at G and is led along the boiler to the steam-cylinders.

Surrounding the steam-tube in the fire-box is a tube, D, of such adiameter as to leave a small annular space intervening between it andAall round. The tube is fixed to the crown of the lire-box, the holes ofwhich, through which the steam-pipe A passes, being ot' the samediameter as the tube D, so that the water from the boiler can passfreely1 into the annular space of the latter through the annularopenings round A. The opening into the tube D at B is below thcwater-level of the boiler, while that at Gr may advantageously beslightly higher than the other, and the tube itself also inclines upwardfrom B to G, whereby a continuous circulation of the water through thetube in one and the same direction is established, facilitating thedischarge therefrom ofthe particles of steam as they are generatedtherein. The steam-pipe is maintained in its central position within Dby means of projections d d, formed on the interior of D. Within thesteampipe are placed the disks of wire-gauze or perforated metal a a,held at equal distances apart therein by distance-pieces, while the endone is supported by a cross-piece fixed in the pipe.

The tube D is provided at its lowest point with a branch pipe, a,leading to the outside and provided with a cock, whereby any depositswithin the tube may be discharged from time to time.

Having thus described the nature of my invention and in what manner thesame is to be performed, l claim- 1. In a steam-superheater, thesteampipe passing through the roof ot' the iireboX, extendedhorizontallyT therein, and thence passing upward through the roof ofsaid fire-box for connecting with the cylinders ofthe engine, incombination with a tube inclosing that part ofthe steam-pipe locatedwithin the lire-box to create an intervening water-space between thetwo, said tube having its ends secured in thc roof of the tire-box andin communication with the water-space of the boiler, all substantiallyas shown, for the purpose described.

2. In a st eam-superheater, the steam-pipe passing through the roof ofthe lire-box, extended horizontally therein, and thence passing up- TOOl ranged transversely within said extended part of the steam-pipe, and awater-jacket or tube surrounding the latter, substantially as und for 1the purpose described.

In testimony whereofl have signed my name to this specification, in thepresence oftwo subscribing; Witnesses, this 2d day of November, A. D.1881.'

AUGUSTE ESTRADE. 'Vitnesses:

J ULEs DUPONT, JULES DIGEoN.

